Table 1 Participant characteristics by MeDi group.

From: Diet moderates the effect of resting state functional connectivity on cognitive function

 

Low MeDi

Moderate MeDi

High MeDi

Sig. (p)

N

66

67

68

 

Age (years)

51.11 (16.64)

56.97 (14.48)

54.19 (16.43)

0.106

Education (years)

16.14 (2.33)

16.40 (2.37)

15.89 (2.07)

0.430

% Female

37.9

64.2

57.4

0.007**

% Non-Hispanic white

63.6

65.7

69.1

0.946a

% Non-Hispanic black

24.2

23.9

19.1

% Other race/ethnicity

12.1

10.4

11.8

NART IQ

116.74 (8.52)

118.01 (8.40)

117.08 (7.42)

0.647

Mean cortical thickness

2.58 (0.12)

2.53 (0.10)

2.55 (0.13)

0.256

Total brain volume

1509.00 (51,458.97)

− 7347.06 (44,941.06)

6405.33 (53,462.90)

0.274

WMH

1162.80 (3235.90)

1128.51 (3359.58)

997.38 (4129.21)

0.929

DTI FA

0.443 (0.022)

0.440 (0.020)

0.445 (0.022)

0.405

Scrub %

4.94 (7.68)

6.86 (11.60)

5.96 (7.12)

0.473

Overall rsFC

0.252 (0.044)

0.247 (0.046)

0.245 (0.045)

0.599

FLUID

− 0.032 (0.813)

0.064 (0.868)

0.085 (0.839)

0.702

MEMORY

0.034 (0.683)

− 0.033 (0.859)

− 0.011 (0.800)

0.886

VOCAB

0.231 (0.753)

0.092 (0.899)

0.094 (0.796)

0.533

SPEED

0.034 (0.804)

0.062 (0.736)

0.084 (0.787)

0.935

  1. Mean (SD) reported for continuous outcomes, percentages reported for categorical outcomes.
  2. p-values reflect differences between MeDi groups based on one-way ANOVAs and Pearson’s chi-square tests.
  3. WMH white matter hyperintensities, DTI FA fractional anisotropy, Scrub % percentage of motion artifact removed, FLUID fluid reasoning, MEMORY episodic memory, VOCAB vocabulary, SPEED perceptual speed.
  4. **p < 0.01.
  5. ap-value reflects chi-square test of all 3 race/ethnicity categories by MeDi group.